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arXiv 1308.6002nucl-thastro-ph.SR
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从原子核结构到中子星

From nuclear structure to neutron stars

Stefano Gandolfi, Andrew W. Steiner

摘要:

近年来,在核子-核子相互作用下的量子蒙特卡罗方法的研究取得了新的进展,成功地描述了轻核和丰中子物质的性质。作为示范,我们表明,12 C的电荷形状因子的理论计算和实验数据之间的协议是极好的。将类似的方法应用于同位旋不对称系统,可以描述中子被限制在外部势和均匀的富中子物质中。特别令人感兴趣的是核对称能,即产生同位旋不对称的能量成本。将这些进展与最近对中子星质量和半径的观测相结合,可以深入了解接近和高于饱和密度的富中子物质的状态方程。特别是,中子星半径的测量限制了对称能的导数。

英文摘要:

Recent progress in quantum Monte Carlo with modern nucleon-nucleon interactions have enabled the successful description of properties of light nuclei and neutron-rich matter. As a demonstration, we show that the agreement between theoretical calculations of the charge form factor of 12C and the experimental data is excellent. Applying similar methods to isospin-asymmetric systems allows one to describe neutrons confined in an external potential and homogeneous neutron-rich matter. Of particular interest is the nuclear symmetry energy, the energy cost of creating an isospin asymmetry. Combining these advances with recent observations of neutron star masses and radii gives insight into the equation of state of neutron-rich matter near and above the saturation density. In particular, neutron star radius measurements constrain the derivative of the symmetry energy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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